Datasheet

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-1.5
-1
-0.5
0
0.5
1
1.5
0
16384
32768
49152 65536
Code
INL
-LSBs
-1
-0.5
0
0.5
1
0
16384
32768
49152 65536
Code
DNL
-LSBs
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
20
0 25 50 75 100 125
f-Frequency-kHz
Amplitude-dB
8192Points
f
s
=250KSPS
f
i
=20KHz,0dB
SINAD=87.7dB
THD=-103.9dB
BASIC OPERATION
ADS8505
SLAS180B – SEPTEMBER 2005 – REVISED JUNE 2007
TYPICAL CHARACTERISTICS (continued)
INTEGRAL NONLINEARITY
Figure 18.
DIFFERENTIAL NONLINEARITY
Figure 19.
FFT (20-kHz Input)
Figure 20.
Figure 21 shows a basic circuit to operate the ADS8505 with a full parallel data output. Taking R/ C (pin 24) low
for a minimum of 40 ns (1.75 µ s max) initiates a conversion. BUSY (pin 26) goes low and stays low until the
conversion is completed and the output registers are updated. Data is output in binary 2's complement format
with the MSB on pin 6. BUSY going high can be used to latch the data.
8
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